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Correct the char's bby and bbh if it's clipped

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20207 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Alexander Levin 2009-03-05 21:27:55 +00:00
parent 0c69a83253
commit 7c93b5cb60
1 changed files with 12 additions and 2 deletions
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14
tools/convbdf.c
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@ -67,6 +67,9 @@ struct font {
#define isprefix(buf,str) (!strncmp(buf, str, strlen(str)))
#define strequal(s1,s2) (!strcmp(s1, s2))
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#define EXTRA 300 /* # bytes extra allocation for buggy .bdf files*/
int gen_c = 0;
@ -541,7 +544,7 @@ int bdf_read_bitmaps(FILE *fp, struct font* pf)
bitmap_t *ch_bitmap = pf->bits + ofs;
int ch_words;
int overflow_asc, overflow_desc;
int y;
int bbh_orig, bby_orig, y;
if (encoding < 0)
continue;
@ -573,12 +576,16 @@ int bdf_read_bitmaps(FILE *fp, struct font* pf)
#define BM(row,col) (*(ch_bitmap + ((row)*ch_words) + (col)))
#define BITMAP_NIBBLES (BITMAP_BITSPERIMAGE/4)
bbh_orig = bbh;
bby_orig = bby;
overflow_asc = bby + bbh - pf->ascent;
if (overflow_asc > 0) {
pf->num_clipped_ascent++;
if (overflow_asc > pf->max_over_ascent) {
pf->max_over_ascent = overflow_asc;
}
bbh = MAX(bbh - overflow_asc, 0); /* Clipped -> decrease the height */
fprintf(stderr, "Warning: character %d goes %d pixel(s)"
" beyond the font's ascent, it will be clipped\n",
encoding, overflow_asc);
@ -589,6 +596,8 @@ int bdf_read_bitmaps(FILE *fp, struct font* pf)
if (overflow_desc > pf->max_over_descent) {
pf->max_over_descent = overflow_desc;
}
bby += overflow_desc;
bbh = MAX(bbh - overflow_desc, 0); /* Clipped -> decrease the height */
fprintf(stderr, "Warning: character %d goes %d pixel(s)"
" beyond the font's descent, it will be clipped\n",
encoding, overflow_desc);
@ -597,7 +606,7 @@ int bdf_read_bitmaps(FILE *fp, struct font* pf)
pf->num_clipped++;
}
y = bby + bbh; /* 0-based y within the char */
y = bby_orig + bbh_orig; /* 0-based y within the char */
/* read bitmaps*/
for (i=0; ; ++i) {
@ -613,6 +622,7 @@ int bdf_read_bitmaps(FILE *fp, struct font* pf)
y--;
if ((y >= pf->ascent) || (y < -pf->descent)) {
/* We're beyond the area that Rockbox can render -> clip */
--i; /* This line doesn't count */
continue;
}